保溫箱/冰袋

一個轉身兩個世界
HI all,

it seems a very unusal question, but my husband and I will go to Hokkaido for 10 days and we'll be driving most of the time. We plan to buy a cooler bag (保溫箱, 冰袋) when we arrive so we can store some drinks/fruit in the car when we travel. Do you know if I can find them easily in the department stores/malls around JR Sapporo station?

THank you for your help!

Janet